Di-n-butyl methylphosphonate
甲基膦酸二正丁酯
Also known as: Dibutyl methylphosphonate, DI-N-BUTYL METHYLPHOSPHONATE, Dibutyl methanephosphonate, DI-N-BUTYL METHANEPHOSPHONATE, Methylphosphonic acid, dibutyl ester, Phosphonic acid, P-methyl-, dibutyl ester, 1-[butoxy(methyl)phosphoryl]oxybutane, MFCD00015242
Di-n-butyl methylphosphonate (CAS 2404-73-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H21O3P and a molecular weight of 208.23500 g/mol. It is also known as Dibutyl methylphosphonate, DI-N-BUTYL METHYLPHOSPHONATE and Dibutyl methanephosphonate. Key properties include a boiling point of 264.5ºC at 760mmHg, a density of 0.973g/cm3 and a flash point of 127.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2404-73-1
- Jingsj CID
- J-37091-0
- Molecular Formula
- C9H21O3P
- Chinese Name
- 甲基膦酸二正丁酯
- Molecular Weight
- 208.23500 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 264.5ºC at 760mmHg |
|---|---|
| Density | 0.973g/cm3 |
| Flash Point | 127.8ºC |
| Exact Mass | 208.12300 |
| PSA | 45.34000 |
| LogP | 3.44270 |
| Appearance | Liquid |
| Vapor Pressure | 0.0158mmHg at 25°C |
| Refractive Index | 1.419 |
Customs & Trade Information
| HS Code | 2931900090 |
|---|---|
| Summary | 2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Di-n-butyl methylphosphonate?
The CAS number of Di-n-butyl methylphosphonate is 2404-73-1.
What are the molecular formula and molecular weight of Di-n-butyl methylphosphonate?
Di-n-butyl methylphosphonate has molecular formula C9H21O3P and molecular weight 208.23500 g/mol.
What are the upstream and downstream products of Di-n-butyl methylphosphonate?
For Di-n-butyl methylphosphonate, Upstream Products: Dibutyl phosphite, iodomethane, Methylphosphonic acid; Downstream Products: Methylphosphonic acid.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Di-n-butyl methylphosphonate (CAS 2404-73-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-37091-0 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.